Strike industries castle nut w/ extended qd endplate - Strike Industries AR Enhanced Castle Nut /Extended End Plate

This is a fantastic product to add flash to your AR. It was very easy to install, and can be tightened down with a normal armorers wrench. The QD endplate allows for easy QD sling attachment right below the buffer tube extension. Additionally, the QD endplate allows for the ability to have a set screw set for the spring and detent for the take down pin. Would definitely recommend, and will buy again for future builds.